Male coupler of pipe coupling



FIG. 1 is a front view of a male coupler of pipe coupling of the present invention;

FIG. 2 is a rear view thereof;

FIG. 3 is a plane view thereof;

FIG. 4 is a first side view thereof; and,

FIG. 5 is a second side view thereof. 

I claim the ornamental design for a male coupler of pipe coupling, as shown and described. 